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Trial Wavefunctions for the Goldstone Mode in v=1/2+1/2 Quantum Hall Bilayers


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Authors

Moller, G 
Simon, SH 

Abstract

jats:pBased on the known physics of the excitonic superfluid or 111 state of the quantum Hall bilayer, we create a simple trial wavefunction ansatz for constructing a low-energy branch of (Goldstone) excitations by taking the overall ground state and boosting one layer with respect to the other. This ansatz works extremely well for any interlayer spacing. For small , this is simply the physics of the Goldstone mode, whereas for large , this is a reflection of composite fermion physics. We find hints that certain aspects of composite fermion physics persist to low whereas certain aspects of Goldstone mode physics persist to high . Using these results, we show nonmonotonic behavior of the Goldstone mode velocity as a function of .</jats:p>

Description

Keywords

SPONTANEOUS INTERLAYER COHERENCE, PHASE-TRANSITIONS, SYSTEMS, STATES

Journal Title

ADV COND MATTER PHYS

Conference Name

Journal ISSN

1687-8108
1687-8124

Volume Title

Publisher

Hindawi Limited